There is Some Cross Resistance Developed Between Both the First Use of Zytiga and the First Use of Xtandi

On March 4, 2014 I wrote a post “Castrate Resistant Prostate Cancer- What to Do Next” (www.advancedprostatecancer.net/?p=4425). The basic theme of the post was about how difficult it is to know how to sequence the new drugs we have to treat advanced prostate cancer (metastatic castrate resistant prostate cancer aka mCRPC). In the post I [...]

Castrate Resistant Prostate Cancer- What To Do Next?

Confusion, confusion and more confusion, that is how I would describe the current decision making process for a man with prostate cancer that has become newly castrate resistant. Just a few years ago the decision tree was clear, castrate resistant, immediately on to chemotherapy with docetaxel. Today, in this treatment space, we have a number [...]

Xtandi Shows Activity in Men with Prostate Cancer Resistant to Chemotherapy and Zytiga

Since its FDA approval in 2011 FDA abiraterone (Zytiga) has supplanted docetaxel (chemotherapy), other than perhaps Provenge, as preferred first-line treatment for metastatic castrate-resistant prostate cancer. August 2012 saw the FDA approval of enzalutamide (Xtandi) for the treatment of castrate-resistant prostate cancer after chemotherapy. Researchers performed a retrospective chart review at a large medical oncology [...]

A Statistical Nightmare – Comparing the Efficacy of Zytiga & Xtandi In the Pre-Chemo Setting

Based on the assumption that Enzalutamide (Xtandi) is approved for use in men with castrate resistant metastatic prostate cancer (advanced prostate cancer or mCRPC) who have not had prior chemotherapy, pretty much a foregone conclusion based on the extraordinary phase III Prevail Trial results, including a statistically significant survival advantage of 2.2 months with a [...]

PLATO – A New Phase 4 Clinical Trial Extending the Use of Xtandi & Combining It with Zytiga

The makers of Enzalutamide (Xtandi), Astellas Pharma US, Inc and Medivation, Inc have begun a Phase 4 clinical trial known as PLATO. The study is designed to evaluate the efficacy and safety of continued treatment with enzalutamide (Xtandi) plus abiraterone acetate (Zytiga) and prednisone as compared to treatment with Zytiga and prednisone alone in men [...]

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